please add this patch from mozilla to the firefox 1.5 ebuild. otherwise people using gtk2 will suffer a lot from firefox hangs: https://bugzilla.mozilla.org/show_bug.cgi?id=305970
please check to make sure patches before requesting a patch be used that is already applied.
I actually did have a look at the source code and couldn't find the appropriate parts - but maybe I overlooked it.
look at patch mozilla-firefox-1.5-gtk.patch I should have named it gtk2 but did not.